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A cell-type-specific alternative splicing regulator shapes synapse properties in a trans-synaptic manner
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![Figure 2 Conditional ablation of SLM2 in hippocampal cell types (A) Cre drivers to assess the molecular profile of hippocampal Cornu Ammonis (CA) 1 (CamK2-cre), CA3 (Grik4-cre), and SST-positive (SST-cre) neurons. (B) Fitted Gaussian curves of relative frequency of SLM2 immunoreactivity in CA1, CA3 and SST cre-positive neurons in the stratum oriens (s.o) of CA1 and CA3. Background immunoreactivity defined based on staining of global Slm2KO mice. n = 3 animals each. CA1: 68 cells, CA3: 75 cells, SST CA1 s.o: 73 cells, SST CA3 s.o: 60 cells, dentate gyrus (DG): 62 cells. (C) SLM2 expression in cre-positive cells defined by immunoreactivity for conditional Rpl22HA allele in Slm2+/+ and Slm2fl/fl mice (HA: magenta, SLM2: green, scale bar, 40 μm). (D) Quantification of SLM2 deletion efficiency at P42–45 in CA1 (ΔCamK2, N = 4, n = 1,081) and CA3 (ΔGrik4, N = 4, n = 1,070) and at P16–18 in SST (ΔSST, N = 5, n = 157) neurons. Mean ± SEM. (E) Principal-component analysis of genes expressed in hippocampal Slm2 wild-type and conditional knockout RiboTRAP pull-downs (wild type [WT] in green: Grik4cre:Rpl22HA/HA N = 4, ΔGrik4: Grik4cre::Rpl22HA/HA::Slm2fl/fl N = 4; WT in purple: Camk2cre::Rpl22HA/HA N = 3, ΔCamK2: Camk2cre::Rpl22HA/HA::Slm2fl/fl N = 3; WT in red: SSTcre::Rpl22HA/HA N = 4, ΔSST: SSTcre::Rpl22HA/HA::Slm2fl/fl N = 4). Variances explained by principal component 1 (PC1) and PC2 are indicated. Variance stabilization transformation was utilized to normalize gene expression. (F) Correlation analysis of the mean log10 transformed, normalized transcript counts (reads per kilobase million [rpkm]) between WT (x axis) and mutants (y axis). Differentially expressed genes (fold change ≥ 1.5, adjusted p value Benjamini and Hochberg ≤ 0.05) are marked in color.](/paper-figures/66d1526ac00848f88379168709844886/a-cell-type-specific-alternative-splicing-regulator-shapes-synapse-properties-in-figure-2.jpg)


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“For example, KH-domain STAR-family RBPs regulate SS4+ in a neuronal activity dependent manner23–25, mediating trans-synaptic signaling by varying interactions among a host of post-synaptic ligands.”
From Phenotypic complexities of rare heterozygous neurexin-1 deletions (2025) · cites this paper as [24]
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Cited by
Phenotypic complexities of rare heterozygous neurexin-1 deletions
Fernando, M. B., Fan, Y., Zhang, Y., Tokolyi, A., Murphy, A. N., Kammourh, S., Deans, P. J. M., Ghorbani, S., Onatzevitch, R., Pero, A., et al. (2025) · Nature · doi:10.1038/s41586-025-08864-9 · Cited by 30
Metadata
- Authors
- Traunmüller, L., Schulz, J., Ortiz, R., Feng, H., Furlanis, E., Gomez, A. M., Schreiner, D., Bischofberger, J., Zhang, C., & Scheiffele, P.
- Venue
- Cell Reports
- Publisher
- Elsevier BV
- Published
- 2023-03
- Volume
- 42
- Issue
- 3
- Pages
- 112173
- ISSN
- 2211-1247
- PMC
- PMC10066595
- Cited by
- 31
- References
- 14
- Language
- en
- Licence
- Funders
- National Institutes of Health (R01NS125018)
- European Research Council (AIMS-2-TRIALS)
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (179432, TMAG-3-209273, 176321)
- European Commission
- Universität Basel
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